An experiment on the effects of light changes on photosynthesis

While the experiment is running, record the weather conditions, especially noting the amount of sunlight, and observe what is happening in the pipettes and the flasks without disturbing the light filters or foil.

Too much light at a high intensity can damage chloroplasts. This so the large volume of water in the beaker maintains a constant temperature around the pond weed. What colors do chlorophyll a and chlorophyll b absorb and reflect?

Using your predictions, develop a hypothesis about how you expect light color to affect photosynthesis in Elodea. Compare your results to those of other groups using a class data chart.

Was your hypothesis supported? However, Elodea in the dark may still produce gas. By counting the number of bubbles given of in a fixed time period for e.

Basic Materials needed for lab group of students: Dependent variables The dependent variable will be the number of bubbles formed and floated to the top of the test tube.

Set the flasks in the sun. Health and safety checked, September Downloads. Make sure each flask is exposed to a similar amount of sunlight. The students could develop this practical as an assessed investigation if they develop hypotheses and plan the experimental detail from the core protocol.

The effects of light on photosynthesis The animation below describes an experiment to investigate the effects of light on photosynthesis.

Baking soda is added to the test tubes to provide adequate amounts of carbon dioxide for photosynthesis to occur.

Make sure enough disks are available to properly complete a controlled experiment. Additionally the trials taken at 10cm had an exceptionally high measurement. Students should collect and set up all the other apparatus before collecting the boiling tube of pond weed.An assumption being made in this experiment is that the gas bubbles being counted are only oxygen, and that production of oxygen is proportional to the rate of photosynthesis.

Another assumption is that all the bubbles are the same size. - The Effect of Light Intensity on the Rate of Photosynthesis Experiment: An experiment to investigate the effect of light intensity on the rate of photosynthsis.

Aim: We will be trying to see if light intensity has an effect on the rate of photosynthsis. - The Effect of Light Intensity on the Rate of Photosynthesis Experiment: An experiment to investigate the effect of light intensity on the rate of photosynthsis. Aim: We will be trying to see if light intensity has an effect on the rate of photosynthsis.

each color effects the photosynthetic rate. Light Filters are used and. This experiment will look at the affect of light intensity on the rate of photosynthesis on Elodea plants. The rate of photosynthesis is determined by the number of bubbles formed by the Elodea plants.

Investigating the light dependent reaction in photosynthesis. Traditionally the production of oxygen and starch are used as evidence for photosynthesis. The light-dependent reactions produce a reducing agent. This normally reduces NADP, but in this experiment the electrons are accepted by the blue dye DCPIP.

Reduced DCPIP is colourless. The effects of light on photosynthesis The animation below describes an experiment to investigate the effects of light on photosynthesis. The affect of light on photosynthesis can be investigated using the experimental setup shown.